A carbon–carbon hybrid – immobilizing carbon nanodots onto carbon nanotubes

Language
en
Document Type
Article
Issue Date
2017-07-03
Issue Year
2015
Authors
Strauss, Volker
Margraf, Johannes T.
Clark, Timothy
Guldi, Dirk M.
Editor
Abstract

The thrust of this work is to integrate small and uniformly sized carbon nanodots (CNDs) with single-walled carbon nanotubes (SWCNT) of different diameters as electron donors and electron acceptors, respectively, and to test their synergetic interactions in terms of optoelectronic devices. CNDs (denoted pCNDs, where p indicates pressure) were prepared by pressure-controlled microwave decomposition of citric acid and urea. pCNDs were immobilized on single-walled carbon nanotubes by wrapping the latter with poly(4-vinylbenzyl trimethylamine) (PVBTA), which features positively charged ammonium groups in the backbone. Negatively charged surface groups on the CNDs lead to attractive electrostatic interactions. Ground state interactions between the CNDs and SWCNTs were confirmed by a full-fledged photophysical investigation based on steady-state and time-resolved techniques. As a complement, charge injection into the SWCNTs upon photoexcitation was investigated by ultra-short time-resolved spectroscopy.

Journal Title
Chemical Science
Volume
6
Issue
12
Citation
Chemical Science 6.12 (2015): S. 6878-6885. <http://pubs.rsc.org/en/content/articlelanding/2015/sc/c5sc02728d#!divAbstract>
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